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Crystalline polymorphs of a muscarinic acetylcholine receptor agonist

a technology of muscarinic acetylcholine and crystalline polymorphs, which is applied in the field of crystalline polymorphs of muscarinic acetylcholine receptor agonists, can solve the problems of unacceptable safety margins of xanomeline and other related muscarinic agonists

Active Publication Date: 2021-08-05
NSC THERAPEUTICS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes how to make medication containing a compound called Compound A, which can be directly compressed into tablets. This has advantages such as being a simpler process and maintaining stability. The tablets can also contain other ingredients like binders, disintegrants, and colorants. The medication can be coated with a pharmaceutically acceptable coating to control the release of the compound in the gastrointestinal tract. The compound can also be pre-manufactured into oral capsules and tableted. Overall, this patent describes a process for making a medicament using a specific form of the compound, which can be conveniently compressed and coated for disease-specific release characteristics.

Problems solved by technology

However, in all clinical studies xanomeline and other related muscarinic agonists have displayed an unacceptable safety margin with respect to cholinergic adverse events, including nausea, gastrointestinal pain, diahorrhea, diaphoresis (excessive sweating), hypersalivation (excessive salivation), syncope and bradycardia.

Method used

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  • Crystalline polymorphs of a muscarinic acetylcholine receptor agonist
  • Crystalline polymorphs of a muscarinic acetylcholine receptor agonist
  • Crystalline polymorphs of a muscarinic acetylcholine receptor agonist

Examples

Experimental program
Comparison scheme
Effect test

example 1

ne Form I Compound A

[0201]a) To Compound A (1.37 g) was added ethyl acetate (7 ml), and the mixture was heated to dissolve the compound. The clear solution was cooled at room temperature overnight. Solid material which appeared to the naked eye to be crystalline formed in the solution. This material was collected by filtration and dried at room temperature under vacuum to give 1.06 g of solid Compound A. X-ray powder diffraction, which yielded the following 2-theta values, d-spacings and relative intensities, confirmed that the material was crystalline (FIG. 1):

2 θ (±0.1)d (Å, unrounded)I / I0 8.810.069 5.3 9.69.1821.812.37.22451.915.65.6992.217.55.067100.019.34.6110.619.94.4649.321.64.11016.022.73.9081.123.03.8611.823.53.7835.124.53.6275.826.33.3859.127.23.2750.228.83.1013.030.32.9481.131.32.8585.431.62.8265.932.52.7560.634.02.6360.834.52.5983.035.42.5377.036.02.4951.837.12.4260.737.42.4030.638.52.3371.439.02.3100.439.42.2832.6

[0202]Solid-state CP / MAS 13C NMR of the crystalline mater...

example 2

ne Form I Compound A

[0206]a) To Compound A (1.07 gr.) was added water (25 ml), and the mixture was heated to dissolve the compound. The clear solution was cooled at room temperature overnight and the precipitated crystals were collected by filtration. The resulted crystals were dried to give 0.82 gr. of Compound A. m.p. 134.7-135.2° C.

[0207]x-ray powder diffraction (XRPD): [2 Th, d (A), I / I0] (8.8, 10.052, 6), (9.6, 9.174, 4), (12.3, 7.223, 73.9), (15.6, 5.696, 4.9), (17.3, 5.126, 81.3), (17.5, 5.066, 100), (19.3, 4.6, 1.8), (19.9, 4.461, 20.3), (21.6, 4.106, 39.8), (23.1, 3.857, 5.6), (23.5, 3.782, 6.3), (24.5, 3.632, 12.2), (26.3, 3.388, 20.9), (27.2, 3.276, 0.5), (28.8, 3.097, 8.4), (30.3, 2.945, 3.6), (31.2, 2.865, 9.8), (31.6, 2.83, 14.1), (32.5, 2.751, 2.6), (34, 2.634, 3.3), (34.5, 2.597, 5.9), (35, 2.564, 4.8), (35.4, 2.533, 9.3), (36, 2.493, 5.9), (37.4, 2.405, 2.4), (38.5, 2.338, 4.1), (39.4, 2.285, 3.8).

[0208]Solid-state CP / MAS 13C NMR chemical shifts (δc in ppm) 13.289, ...

example 3

ne Form I Compound A

[0213]To Compound A (1.0 g) was added isopropanol (3.5 ml), and the mixture was heated to dissolve the compound. The clear solution was cooled at room temperature overnight. Solid material which appeared to the naked eye to be crystalline formed in the solution. This material was collected by filtration and dried at room temperature under vacuum to give 0.5 g of solid Compound A.

[0214]Solid-state CP / MAS 13C NMR of the crystalline material yielded a spectrum having the following chemical shifts (δc in ppm, unrounded): 13.423, 30.301, 43.729, 41.122, 52.289, 54.237, 46.739, 67.222, 174.457.

[0215]ATR-FT-IR yielded a spectrum having the following absorption peaks (cm−1, unrounded): 725, 775, 809, 827, 890, 945, 985, 1012, 1027, 1071, 1111, 1144, 1195, 1278, 1292, 1353, 1371, 1389, 1427, 1438, 1468, 1672, 2845, 3021, 3158, 3427.

[0216]This form is defined as Form I because of characteristic peaks in CP / MAS 13C NMR & ATR-FT-IR.

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Abstract

Provided are novel crystalline forms of a spiro-compound which acts as a muscarinic acetylcholine receptor agonist. In particular, isolated crystalline polymorphs of (S)-2-ethyl-8-methyl-1-thia-4,8-diazaspiro[4.5]decane-3-one are described which have favorable properties in pharmaceutical manufacture. Also provided are methods to prepare said crystalline polymorphs, and to convert them into each other as well as methods for preparing medicaments containing the same which are suitable for use in the treatment of diseases and disorders that respond to modulation of the muscarinic acetylcholine receptor.

Description

FIELD OF THE INVENTION[0001]The present invention relates to crystalline polymorphs of a spiro-compound, pharmaceutical compositions containing the polymorphs, and their use in the treatment of acetylcholine-mediated diseases.BACKGROUND OF THE INVENTION[0002]The degeneration of cholinergic neurons and cholinergic hypofunction are pathologies associated with Alzheimer's disease (AD). Muscarinic acetylcholine receptors (mAChRs) mediate acetylcholine-induced neurotransmission and five mAChR subtypes (M1-M5) have been identified. Among them, M1 receptor is widely expressed in the central nervous system (CNS) and has been implicated in many physiological and pathological brain functions. In addition, M1 receptor is postulated to be an important therapeutic target for AD and several other neurodegenerative diseases; see for review, e.g., Jiang et al., Neurosci. Bull. 30 (2014), 295-307. Xanomeline, an orthosteric muscarinic agonist with modest selectivity for M1 and M4, was one of the fir...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C07D513/10A61P27/02
CPCC07D513/10C07B2200/13A61P27/02A61K31/429A61P1/00A61P1/02A61P1/04A61P1/10A61P1/12A61P1/14A61P11/00A61P11/06A61P13/00A61P15/02A61P17/00A61P17/16A61P19/02A61P25/00A61P25/02A61P25/04A61P25/14A61P25/16A61P25/18A61P25/20A61P25/22A61P25/24A61P25/28A61P25/32A61P27/04A61P27/06A61P27/10A61P29/00A61P3/00A61P3/04A61P35/00A61P3/06A61P3/10A61P37/02A61P39/06A61P43/00A61P5/00A61P9/10
Inventor FISHER, ABRAHAMBAR-NER, NIRAWINDISCH, MANFRED
Owner NSC THERAPEUTICS GMBH
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